- Add `shouldUpgradeCallback` to HTTP server API, enabling servers to control protocol upgrades and fixing related HTTP/2 upgrade handling.
- Introduce a new worker heap profiling API for memory analysis of worker threads.
- Refresh SQLite support: clean up ERM, export a `Session` class, and add a tagged template literal API; also expose `signatureAlgorithm` on X509Certificate and convert several crypto functions to async.